JavaScript/jQuery LoadPanel Methods
This section describes members used to manipulate the widget.
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beginUpdate()
Prevents the widget from refreshing until the endUpdate() method is called.
The beginUpdate() and endUpdate() methods prevent the widget from excessive updates when you are changing multiple widget settings at once. After the beginUpdate() method is called, the widget does not update its UI until the endUpdate() method is called.
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content()
Gets the widget's content.
An HTML element or a jQuery element when you use jQuery.
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defaultOptions(rule)
Specifies the device-dependent default configuration options for this component.
The component's default device options.
defaultOptions is a static method that the widget class supports. The following code demonstrates how to specify default options for all instances of the LoadPanel widget in an application executed on the desktop.
jQuery
DevExpress.ui.dxLoadPanel.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the LoadPanel options } });
Angular
import LoadPanel from "devextreme/ui/load_panel"; // ... export class AppComponent { constructor () { LoadPanel.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the LoadPanel options } }); } }
Vue
<template> <div> <DxLoadPanel id="loadPanel1" /> <DxLoadPanel id="loadPanel2" /> </div> </template> <script> import DxLoadPanel from "devextreme-vue/load-panel"; import LoadPanel from "devextreme/ui/load_panel"; LoadPanel.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the LoadPanel options } }); export default { components: { DxLoadPanel } } </script>
React
import React from "react"; import dxLoadPanel from "devextreme/ui/load_panel"; import LoadPanel from "devextreme-react/load-panel"; class App extends React.Component { render () { dxLoadPanel.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the LoadPanel options } }) return ( <div> <LoadPanel id="loadPanel1" /> <LoadPanel id="loadPanel2" /> </div> ) } } export default App;
dispose()
Disposes of all the resources allocated to the LoadPanel instance.
After calling this method, remove the DOM element associated with the widget:
jQuery
$("#myLoadPanel").dxLoadPanel("dispose"); $("#myLoadPanel").remove();
Angular
<dx-load-panel #loadPanelVar id="myLoadPanel"></dx-load-panel>
import { ..., ViewChild } from "@angular/core"; import { DxLoadPanelComponent } from "devextreme-angular"; // ... export class AppComponent { @ViewChild("loadPanelVar", { static: false }) loadPanel: DxLoadPanelComponent; // Prior to Angular 8 // @ViewChild("loadPanelVar") loadPanel: DxLoadPanelComponent; removeLoadPanel (e) { this.loadPanel.instance.dispose(); document.getElementById("myLoadPanel").remove(); } }
element()
Gets the root widget element.
An HTML element or a jQuery element when you use jQuery.
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endUpdate()
Refreshes the widget after a call of the beginUpdate() method.
Main article: beginUpdate()
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getInstance(element)
Gets the instance of a widget found using its DOM node.
The widget's instance.
getInstance is a static method that the widget class supports. The following code demonstrates how to get the LoadPanel instance found in an element with the myLoadPanel
ID:
// Modular approach import LoadPanel from "devextreme/ui/load_panel"; ... let element = document.getElementById("myLoadPanel"); let instance = LoadPanel.getInstance(element) as LoadPanel; // Non-modular approach let element = document.getElementById("myLoadPanel"); let instance = DevExpress.ui.dxLoadPanel.getInstance(element);
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hide()
Hides the widget.
A Promise that is resolved after the widget is hidden. It is a native Promise or a jQuery.Promise when you use jQuery.
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instance()
Gets the widget's instance. Use it to access other methods of the widget.
This widget's instance.
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off(eventName)
Detaches all event handlers from a single event.
The event's name.
The object for which this method is called.
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- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
off(eventName, eventHandler)
Detaches a particular event handler from a single event.
The object for which this method is called.
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on(eventName, eventHandler)
Subscribes to an event.
The object for which this method is called.
Use this method to subscribe to one of the events listed in the Events section.
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on(events)
Subscribes to events.
Events with their handlers: { "eventName1": handler1, "eventName2": handler2, ...}
The object for which this method is called.
Use this method to subscribe to several events with one method call. Available events are listed in the Events section.
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- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
option()
Gets all widget options.
The widget's options.
See Also
- Get and Set Options
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option(optionName)
Gets the value of a single option.
The option's name or full path.
This option's value.
See Also
- Get and Set Options
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option(optionName, optionValue)
Updates the value of a single option.
See Also
- Get and Set Options
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option(options)
Updates the values of several options.
Options with their new values.
See Also
- Get and Set Options
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repaint()
Recalculates the widget's size and position without rerendering.
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show()
Shows the widget.
A Promise that is resolved after the widget is shown. It is a native Promise or a jQuery.Promise when you use jQuery.
The widget is automatically hidden after the time specified in the displayTime option.
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toggle(showing)
Shows or hides the widget depending on the argument.
Specifies whether to show or hide the widget.
A Promise that is resolved after the widget is shown/hidden. It is a native Promise or a jQuery.Promise when you use jQuery.
You can use the toggle(showing) method instead of the show() and hide() methods. In this case, pass true or false as the method parameter to show or hide the widget.
The widget is automatically hidden after the time specified in the displayTime option.
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- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core